发明名称 |
Process for producing phase retarder |
摘要 |
A process for producing a phase retarder film or sheet, which comprises subjecting a stretched thermoplastic resin film or sheet to thermal relaxation at a temperature not lower than the glass transition temperature of the thermoplastic resin to shrink the film or sheet in the stretching axis direction while suppressing the expansion of the film or sheet in a direction parallel to the film or sheet surface and perpendicular to the stretching axis.
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申请公布号 |
US5366682(A) |
申请公布日期 |
1994.11.22 |
申请号 |
US19920987803 |
申请日期 |
1992.12.09 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
MORIKAWA, MICHITAKA;HIGASHI, KOJI;SHINDO, TADASHI |
分类号 |
B29C55/00;B29C61/02;B29C71/02;B29D7/01;G02B5/30;G02F1/13363;(IPC1-7):B29C61/02 |
主分类号 |
B29C55/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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